Re: [css-compositing] "add" and "subtract" blend modes

Hi Shawn,

thanks for your feedback!
Do you feel strongly that these blend modes should be in the first
specification, or do you think they could wait until the next version?
Looking at the open source browsers, there is no support under the hood for
these Photoshop specific blend modes which might slow down implementation.

Rik

On Wed, Aug 22, 2012 at 6:33 PM, Shawn Allen <shawn@stamen.com> wrote:

> Hi everyone,
>
> I just stumbled on the working draft for Compositing and Blending 1.0:
>
>         http://www.w3.org/TR/2012/WD-compositing-20120816/
>
> And I noticed that the simple "add" ("linear dodge" in Photoshop) and
> "subtract" ("linear burn") blend modes aren't included. I'm super
> interested in seeing both of these adopted because they offer lots of bang
> for the buck and would make lots of interesting effects possible without
> the use of canvas and per-pixel operations or WebGL pixel shaders.
>
> I'm happy to offer assistance with editing the WD to get these included,
> and/or to debate the merits of their inclusion.
>
> Thoughts?
> --
> Shawn Allen
> shawn@stamen.com
> +1 415 558 1610
>
>
>
>